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BEVO  BUILDING 

St.  Louis.  Mo. 

archs. 

WIDMAN  a  WALSH, 
KLIPSTEIN  a  RATHMAN 
CONTRS. 

GILSON1TE  CONST.  CO. 

FLOOR  SPACE  OVER 
t. 000,000  SO.  FT. 
ALL  TREATED  WITH 

LAP1DOLITH 


I A-PI D  O  |  IT  H 

TRADE  MARK 


Concrete  Jloors  in  these  plants  ivere  wear- 
proofed  and  dustproofed  with  Lapidolith 


FORD  MOTOR  CO.  .  .  Detroit.  Mich 

ARCH.  ALBERT  KAHN 
CONTRS  SELDEN-BRECK  CONST.  CO. 


PACKARD  MOTOR  CAR  CO.  .  .  DETROIT.  MlCH. 
ARCH.  ALBERT  KAHN 
CONTRS.  BRYANT  &  DETWEILER 


WILLIAM  SKINNER  MFG.  CO.  .  .  Holyoke.  Mass. 
CONTRS.  CASPER  RANGER  CONSTRUCTION  CO. 


For  Dustproofing  and  Wearproofing  Concrete  Floors 


Lapidolith,  the  liquid  chemical  hardener  for  concrete 
floors,  has  been  weighed  and  found  not  wanting  in  any 
point  of  service. 

Used  for  years  by  leading  concerns,  it  has  registered 
“Success”  on  the  scales  of  public  opinion. 


Easily  applied  to  new  or  old  concrete  floors,  it  renders 
them  dustproof,  wearproof  and  waterproof.  Results 
are  guaranteed. 

Write  for  all  of  the  evidence,  both  practical  and 
scientific. 


L.  SONNEBORN  SONS,  Inc.,  262  Pearl  Street,  New  York 


THREE-IN -ONE  OIL  CO.  .  .  Rahway.  N.  J 
ARCHS.  a  ENGRS.  H.  D.  BEST  a  CO 


SPERRY  FLOUR  MILLS  .  .  .  San  Francisco.  Cal. 
ARCH,  a  ENGR.  MAURICE  C.  COUCHOT 
CONTRS.  DINWIDDIE  CONST.  CO. 


ozt,!  £77  S*)£l-LV  F>ISSJ0'p 


Concrete  floors  in  these  plants  were  wear- 
proofed  and  dustproofed  with  Lapidolith 


IAPIDOIITH 

m—mmmmm  TRAOC  HARK  hmm 

Ibr  every  Concrete  Flo  or 


PITTSBURG  PLATE  GLASS  CO. 
Pittsburg.  Pa. 

ARCHS.  HUNTING-DAVIS  CO. 
CONTRS.  GEO.  HOGG  CO. 


You  Can  Apply  It 

Unskilled  labor  working  under  ordi¬ 
nary  supervision  can  successfully  apply 
Lapidolith. 

For  example,  at  the  modern  Armstrong 
Cork  Co.  factory,  Lapidolith  was  applied 
without  our  assistance,  and  the  result 
was  such  that  the  floors  in  their  other 
plants  have  since  been  likewise  treated. 


B.  F.  GOODRICH  CO.  .  .  Akron.  Ohio 

ENGRS.  STONE  &  WEBSTER.  OSBORN  ENGINEERING  CO. 
CONTRS.  CARMICHAEL  CONST.  CO..  H  U  N  K  I N-CO  N  K  E  Y  CONST.  CO. 


Or  We  Will  Apply  It 

If  you  so  desire,  we  will  take  all  the 
responsibility  of  applying  Lapidolith, 
as  in  the  case  of  the  Chalmers  Knit¬ 
ting  Co.  We  will  send  an  expert  to 
your  plant  and  he  will  turn  your  floors 
over  to  you  as  hard  as  granite.  We 
have  saved  a  great  many  factory  floors 
in  this  way. 


ROYAL  INSURANCE  CO 
San  Francisco  Cal. 

ARCHS  HOWELL  &  STOKES 
CONTRS.  THOMPSON-STARRETT  CO. 


IA-PIPOIITH 

TRADE  MARK  MMM 

K>r  evei^y  Concrete  Flo  or 


TIN  DECORATING  CO.  .  BALTIMORE.  Md 
ARCH.  THEODORE  WELLS  PIETCH 
CONTRS  IRWIN  &  LEIGHTON 


B  a  O.  WAREHOUSE  PITTSBURG.  Pa 
ARCH.  M  A.  LONG.  ASST.  CHIEF  ENGR..  B.  &  O.  R  R. 


CHALMERS  KNITTING  CO  .  .  AMSTERDAM.  N.  Y. 
ARCHS.  C.  R.  MAKEPEACE  a  CO. 

CONTRS.  TURNER  CONSTR.  CO. 


AMERICAN  EVEREADY  WORKS  .  .  .  OAKLAND.  CAL. 

(NATIONAL  CARBON  CO.) 

ARCH,  a  ENGR  MAURICE  C.  COUCHOT 
ERECTED  BY  NATIONAL  CARBON  CO 


CRANE  CO 

ARCHS.  H.  D  BURNHAM  a  CO  CONTRS.  LANQUI: 

The  Factory  Owner 

Walking  and  trucking  grinds  up  the  sharp  silicate  con¬ 
crete  dust  from  untreated  floors.  If  you  do  not  know 
this,  ask  your  sweepers. 

This  dust  is  the  danger  signal.  Disintegration  is  taking 
place.  It  also  means  that  this  dust  is  getting  into  deli¬ 
cate  machinery  or  perhaps  into  merchandise,  and  so  it  is 
running  up  a  bill  of  expense  for  you. 

Have  Lapidolith  flushed  on  your  floors — old  or  new — 
and  harden  them  chemically.  We  guarantee  positive, 
permanent  results.  Then  there  will  he  no  need  of  patch¬ 
ing,  which  is  always  unsatisfactory,  or  re-topping,  which 
is  extremely  expensive. 

We  will  send  you  testimonials  from  every  state,  every 
city  and  every  line  of  business. 

Lapidolith  has  been  used  for  years.  It  is  a  money-saving 
success.  Untreated  concrete  floors  are  bound  to  dust  and 
break  up.  Lapidolized  floors  are  as  hard  as  granite,  as 
you  can  prove  for  yourself  by  scratching  with  a  nail  or 
sharp  instrument  the  concrete  block  which  we  will  fur¬ 
nish  you,  half  treated,  half  untreated. 

Write  for  full  particulars,  scientific  proof,  testimonials, 
sample  concrete  block  and  sample  of  Lapidolith  for  test 
on  your  own  floors. 


CHEVROLET  MOTO 
ENGRS.  a  CONT 


Concrete  Jloors  in  these  plants  were  wear- 
proofed  and  dustproofed  with  Lapidolith 


hicago.  Ill 

.LSELY  CO..  BLOME  SINEK  CO..  THOM  PSON-STARRETT  CO 


Architect  and  Engineer 

A  large  and  growing  number  of  architects  and  engineers 
know  about  Lapidolith  by  experience.  They  are  speci¬ 
fying  it  because  they  know  it  will  absolutely  dustproof 
and  wearproof  concrete  floors  by  chemical  action. 

Architects  and  engineers  who  are  confronted  with  com¬ 
plaints  regarding  unsatisfactory  concrete  floors  will  gladly 
turn  to  Lapidolith  as  the  way  out  of  an  embarrassing 
situation. 

You  cannot  control  workmen's  mistakes  or  weather  con¬ 
ditions  which  affect  concrete  floors  in  their  plastic  form. 
But  if  mistakes  occur,  Lapidolith  will  save  the  day  by 
saving  the  concrete  floors  from  further  disintegration. 

You  should  specify  that  Lapidolith  be  used  after  new 
floors  are  set  and  dried.  Then  they  are  insured  against 
dust  and  wear. 

Remember,  Lapidolith  is  successfully  used  in  hardening 
millions  of  square  feet  of  concrete  floors  which  were 
considered  satisfactory  by  architect  and  owner  at  the  time 
of  construction — before  Lapidolith  came  into  general  use. 

Specification  booklets  and  full  information  on  request. 

L.  SONNEBORN  SONS,  Inc. 

262  Pearl  Street  New  York 


NORWICH  WOOLEN  MILLS  .  .  .  Norwich.  Conn. 
ARCHS.  C.  R.  MAKEPEACE  &  CO. 

CONTRS.  TURNER  CONST.  CO. 


A.  G.  SPALDING  &  BROS.  .  .  CHICOPEE.  MASS. 


NEW  DEPARTURE  MFG.  CO.  .  .  BRISTOL.  Conn 
ARCHS.  LOCKWOOD.  GREENE  ft  CO. 
CONTRS.  TURNER  CONSTR.  CO. 


R  CO  .  .  Flint.  Mich 
n.  e.  wood  &  co. 


ROCKWOOD  &  CO.  .  .  Brooklyn.  N.  Y 
ARCHS  LOCKWOOD.  GREENE  &  CO. 
CONTRS.  TURNER  CONSTR.  CO. 


IAPJ.R9UJH 

Eir  every  Concreie  Flo  or 


Concrete  floors  in  these  plants  were  wear- 
proofed  and  dustproofed  with  Lapidolith 


LOS  ANGELES  HIGH  SCHOOL  .  .  .  Los  ANGELES.  Cal. 

ARCH.  J.  C.  AUSTIN 

CONTRS.  BARBER  BRADLEY  CONSTR.  CO. 


Concrete  Dust  Must  Be  Eliminated 


from  schools, colleges  and  all  institutions  where  sanitary  conditions 
are  paramount. 

But  concrete  dust  is  normally  ground  up  from  concrete  floors  by 
the  actual  constant  walking  on  concrete  floors. 


The  liquid  chemical  concrete  hardener  Lapidolith  will  stop  both 
concrete  dust  and  wear.  It  improves  sanitary  conditions  and  makes 
it  easier  for  the  janitor  to  keep  the  floors  clean,  because  lapidol- 
ized  floors  are  non-absorbent — practically  waterproof,  so  they  can 
he  easily  washed  and  quickly  dried. 


PURDUE  UNIVERSITY  .  .  .  Lafayette.  Ind 
ARCHS.  R.  P.  DAGGETT  a  CO. 
t  .  '  CONTR.  LESLIE  COLVIN 


ST.  JOSEPH'S  HOSPITAL  .  .  .  Kansas  City,  Mo. 
ARCHS.  WIGHT  a  WIGHT 
CONTRS  GEO.  A  FULLER  CO. 


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Concrete  floors  in  these  plants  were  wear- 
proofed  and  dustproofed  with  Lapidolith 


IAPIPOIITH 

w—mmmm  trade  hark 

For  every  Concrete  Flo  or 


DURHAM  COUNTY  COURT  HOUSE  .  .  .  Durham.  N.  C 
ARCHS.  MILBURN,  HEISTER  CO. 

CONTRS.  GEO.  A.  FULLER  CO. 


MUNICIPAL  BUILDING  .  .  .  Hartford.  Conn. 
ARCHS.  DAVIS  &  BROOKS 

CONTRS.  NORCROSS  BROS.,  P.  J.  CARLIN  CONST.  CO. 


A  Few  of  the  Thousands  of  Users  of  Lapidolith 


American  Woolen  Co . Boston,  Mass. 

American  Writing  Paper  Co . Holyoke,  Mass. 

Armstrong  Cork  Co.  (and  4  other  plants)  .  Camden,  N.  J. 

Continental  Can  Co . Chicago,  Ill. 

Crane  Company  (and  4  other  plants)  .  .  .  Oakland,  Cal. 

Ford  Motor  Co.  (and  20  other  plants)  .  .  .  Detroit,  Mich. 
General  Electric  Co.  (and  4  other  plants)  .  Schenectady,  N.  Y. 

B.  F.  Goodrich  Co . Akron,  Ohio 

Johns  Hopkins  University . Baltimore,  Md. 

Pennsylvania  Railroad 

Standard  Oil  Co . Drumright,  Okla. 

U.  S.  Steel  Corporation 
U.  S.  Navy 

Aetna  Life  Insurance  Co . Hartford,  Conn. 

Aluminum  Company  of  America . Maryville,  Tenn. 

Atlantic  Sugar  Refineries,  Ltd . St.  John,  N.  B. 

Canadian  Fairbanks-Morse  Co . Montreal,  Quo. 

Carborundum  Co . Niagara  Falls,  N.  Y. 

Chalmers  Knitting  Co . Amsterdam,  N.  Y. 

Chevrolet  Motor  Car  Co . Oakland,  Calif. 

Crucible  Steel  Co.  of  America . Syracuse,  N.  Y. 


General  Chemical  Co . Bayonne,  N.  J. 

Goodyear’s  India  Rubber  Glove  Mfg.  Co.  .  Naugatuck,  Conn. 

Gulf  States  Steel  Co . Alabama  City,  Ala. 

National  Can  Co . Detroit,  Mich. 

National  Lamp  Works  (and  2  other  plants)  Cleveland.  Ohio 

New  England  Westinghouse  Co . Springfield,  Mass. 

Nordyke  &  Mannon  Co . Indianapolis,  Ind. 

Rubberset  Co . Newark,  N.  J. 

Washburn  Crosby  Co . Minneapolis,  Minn. 

Whiting  Paper  Co . Holyoke,  Mass. 

Wm.  Wrigley,  Jr.,  Co.  (and  2  other  plants)  .  Brooklyn,  N.  Y. 

Wright-Martin  Aircraft  Co . .  New  Brunswick,  N.  J. 

Allegheny  Steel  Co .  .  .  Pittsburg,  Pa. 

Bemis  Bros.  Bag  Co . Seattle,  Wash. 

Bethlehem  Steel  Co . .  Lebanon,  Pa. 

Daggett  &  Ramsdell . New  York,  N.  Y. 

Fownes  Bros.  &  Co . New  York,  N.  Y. 

Hamilton  Watch  Co.  .  . . .  Lancaster,  Pa. 

Pierce  Arrow  Motor  Car  Co.  . Buffalo,  N.  Y. 

A.  G.  Spalding  &  Bros.  Mfg.  Co . Chicopee,  Mass. 

Three-In-One  Oil  Co . . New  Yrork,  N.  Y. 


SOUTHERN  HOTEL  .  .  .  BALTIMORE.  MD. 
ARCH.  OTTO  G.  SIMONSON 
CONTRS.  LONGACRE  CONST.  CO. 


Lapidolith  Used  in  Every 
Continent 

Australia,  Sydney 

Elliott,  MacLean  &  Co. 
China,  Amoy 

Hope  Hospital 
Cuba,  Havana 

Cuban-American  Sugar  Co. 
England,  Manchester 

W.  MacDonald  &  Co. 

India,  Bombay 

West  Indian  Import  Co. 
Ireland,  Belfast 

Sirocco  Engineering  Works 
Java,  Soerabaia 

Yoorheen  E.  Wichers 
Mexico,  Yucatan 

La  lndustria  Co. 

Norway,  Christiania 

Sigurd  Hesselberg 
Porto  Rico,  San  Juan 

Porto  Rico-American 
Siam,  Bangkok  1  obacco  Co. 

General  Electric  Co. 

South  Africa,  Port  Elizabeth 
Cape  Trading  Co. 

Sweden,  Stockholm 

Martin  Hellner 


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LEXINGTON  STREET  BUILDING 
Baltimore.  Md. 

ARCHS.  PARKE.  THOMAS  fit  RICE 
CONTR.  J.  HENRY  MILLER.  INC. 


DODGE  BROTHERS  MOTOR  CAR  COMPANY 
Detroit,  Mich. 

ARCHS.  &  ENGRS.  SMITH.  HINCHMAN  &  GRYLLS 
CONTRS.  WHITE  CO. 


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How  To  Buy  Lapidolith 

Return  the  enclosed  postal  card  today.  Or  write  stating  the 
approximate  area  ot‘  concrete  floors  you  desire  to  dustproof  and 
wearproof.  We  will  tell  you  how  much  material  you  need,  and 
what  it  will  cost. 

If  you  have  a  large  area  we  will  send  an  expert  to  inspect  it  and 
estimate  the  cost  of  treating  the  floors  under  our  own  supervision. 


m 

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